Mechanism for feeding ball bullets from a bin to a holder

ABSTRACT

The invention relates to pneumatic weapon, in particular, to feeding mechanism for ball bullets from the bin to a holder. 
     A feeding mechanism for ball bullets from the bin to a holder contains a bin  1  provided with additional reservoir  2  which in the lower part are formed communicating therebetween. A vibrator  3  is placed in the lower part of the bin  1  and the additional reservoir  2.  The vibrator  3  is formed of two plates  4  and  5  in form of a letter “L” detail oscillating on the axis  6  due to spring  7  and cam  8,  rotated by the electric drive  9.  A feeding screw mechanism is disposed in the lower parts of the bin  1  and the additional reservoir  2,  the mechanism comprising a screw  10  which spiral is executed as a helical spring. The base  12  is connected to cam  8  through a friction coupling  13.  The cam  8  gains rotation from the electric drive  9  through the gearing  14.  The bin  1  with additional reservoir  2  communicates with the holder  16  through the channel  15.

FIELD OF THE INVENTION

The invention relates to pneumatic weapon, in particular, to mechanisms for feeding ball bullets from the bin to a holder.

BACKGROUND ART

It is known an automatic for shooting by plastic balls according to the Japanese patent No. 4-18237, F41C 3/06, comprising a holder magazine, a bin, a feeding mechanism, and having a drive which is realized manually by hand of the user. When the user manually pulls an actuator element, rotation is transferred to the feeding mechanism, thus the balls placed between teeth of the toothed feeding mechanism are moved through a channel of the holder magazine to the output opening.

A drawback of the given device is that manual filling of the holder magazine reduces consumer performances of the article. The formed rigid walls of the bin contribute in occurring of congestion or bringing together the bullets, and when this happens feeding of the bullets in barrel of the automatic ceases that is a certain drawback at use of the article. The rigid feeding system of the ball bullets in the holder can result in forming of congestion and to wedging the mechanism, that is also a drawback of the known device.

It is known a balls feeding mechanism for the toy guns according to the Japanese patent No. 06074691 on the application 04227495, cl. F41B 11/02 comprising a bin under which a screw feeder (worm) with an electric motor is placed. The screw feeds balls from the bin through a lead-in section to a forcing section through which the balls by means of compressed air are fed to a flexible tube (holder) and move to the gun. Compressed air constantly retains balls in a flexible tube and through holes in the tube leaves out.

The immovability of the bin walls and absence of additional devices eliminating congestion of ball bullets at the bin exit can result in a shut-down of the gun operation that negatively influences its operation reliability. Presence of an air source (additional propellant) feeding ball bullets to the gun complicates the construction of the article that is also an essential shortcoming.

SUMMARY OF THE INVENTION

It is an object of the present invention to create an article with increased operation reliability at simultaneous simplification of its construction.

The specified object is achieved by means of a feeding mechanism for ball bullets from the bin to the holder comprising a feeding mechanism in form of a screw with electric drive, a bin and a holder. The screw spiral is formed as a compression spring.

Preferably, the screw comprises a cylindrical base, and a compression spring is fixed on it by one of its ends distal to the holder.

The bin can be formed with additional reservoir, thus both reservoirs are provided with a common vibrator.

It is expedient to execute both reservoirs of the bin communicating therebetween.

A gap between the spring turns should be equal to 1.2-1.5 diameters of the ball bullets.

The vibrator can be configured for operation with the feeding mechanism drive.

The vibrator movement is preferably realized from the electric drive through a cam.

Preferably the vibrator is placed in the lower part of the bin, thus the vibrator is formed of two plates, joined together with forming L-form installed on the axis and elastically urged to the cam.

Executing of the feeding mechanism with a screw in form of a screw elastic spiral provides constant urging of the ball bullets to the fixing indent opposite to the channel that ensures stable initial speed of the ball bullet flight at a shot. The above mentioned execution of the ball bullets feeding mechanism from the bin to the holder obviously makes it possible to increase operation reliability of the article, since a vibrator is placed in the lower parts of both reservoirs of the bin, precluding formation of ball bullets congestion at leading-in to the accumulating part of the magazine.

Presence of additional reservoir in the bin allows also to remove occurring of congestion and to direct the ball bullets accumulated at the holder entry at operation of the electric drive, to additional reservoir of the bin.

BRIEF DESCRIPTION OF THE DRAWINGS

The essence of the invention is illustrated by drawings, where FIG. 1 shows a general view of the device, FIG. 2 shows a cross-section A-A of FIG. 1, FIG. 3 shows a cross-section B-B of FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

The ball bullets feeding mechanism from the bin to the holder comprises a bin 1 provided with additional reservoir 2 which, in the lower part, are formed communicating therebetween. Vibrator 3 and additional reservoir 2 are disposed in the lower part of the bin 1. The vibrator 3 comprises two plates 4 and 5 formed as letter “L” detail oscillating on axis 6 by spring 7 and cam 8 rotated by the electric drive 9. A feeding screw mechanism is provided in the lower part of bin 1 and additional reservoir 2, the screw mechanism comprising a screw 10 having a spiral executed as a helical compression spring which is connected to a cylindrical base 12 by its bent end 11 distal to the holder. Thus the base 12 is connected to a cam 8 through a friction coupling 13. The cam 8 is rotationally driven from the electric drive 9 through a gearing 14. The bin 1 with the additional reservoir 2 communicates with a holder 16 through channel 15.

The ball bullets feeding mechanism from the bin to the holder operates as follows:

Ball bullets 17 are charged in the bin 1 and the electric drive 9 is actuated. From the electric drive 9, through the gearing 14, rotation it is transmitted to cam 8, then through the friction coupling 13 it is transmitted through the base 12 and the bent end 11 to the screw 10. The ball bullets 17 under action of gravity descend from the bin 1 to the base 12 of the feeding screw mechanism and being urged by the screw spiral of the screw 10, moving through the channel 15, are fed to the holder 16. Thus, the rotating cam 8 drives the vibrator 3 elastically pressed to the cam by 8 spring 7. The vibrator 3 by its walls 4 and 5 shaking on an axis 6, stirs ball bullets 17 precluding in forming congestion.

When holder 16 is filled by the ball bullets 17, the screw 10—since it is executed as a compression spring with a gap between the turns equal to 1.2-1.5 diameters of the ball bullets 17, begins to constrict ensuring elastic compression of ball bullets 17 in the holder to each other and the first ball to the fixing indent 18. The friction coupling 13 defines the predetermined compression force.

When the holder 15 is filled, rotation of the screw 10 ceases. The article is ready to shooting.

Pressing a trigger (not shown in the drawing) enables ejection of the ball bullets 17 under action of compressed gas from the barrel of the gun, simultaneously filling of the holder 16 is provided due to operation of the electric drive 9 (possibly controlled by an electronic device). 

1. A feeding mechanism for ball bullets from the bin to a holder comprising a feeding mechanism in form of a screw with electric drive, a bin and a holder, characterized in that the screw spiral is formed as a compression spring.
 2. The mechanism according to claim 1, characterized in that the screw comprises a cylindrical base, and a compression spring is fixed on it by one of its ends distal to the holder.
 3. The mechanism according to claim 1, characterized in that, the bin is formed with additional reservoir, thus both reservoirs are provided with a common vibrator.
 4. The mechanism according to claim 3, characterized in that both reservoirs of the bin are executed communicating therebetween.
 5. The mechanism according to claim 1, characterized in that a gap between the spring turns should be equal to 1.2-1.5 diameters of the ball bullets.
 6. The mechanism according to claim 3, characterized in that the vibrator is configured for operation with the feeding mechanism drive.
 7. The mechanism according to claim 6, characterized in that the vibrator movement is preferably realized from the electric drive through a cam.
 8. The mechanism according to claim 7, characterized in that the vibrator is placed in the lower part of the bin, thus the vibrator is formed of two plates, joined together with defining L-form installed on the axis and elastically urged to the cam. 